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<table width="100%" summary="page for Gunnels"><tr><td>Gunnels</td><td style="text-align: right;">R Documentation</td></tr></table>

<h2>Gunnels</h2>

<h3>Description</h3>

<p>Presence/absence of gunnels (eels) at shoreline quadrats
</p>


<h3>Format</h3>

<p>A dataset with 1592 observations on the following 10 variables.
</p>

<table summary="Rd table">
<tr>
 <td style="text-align: right;">
    <code>Gunnel</code> </td><td style="text-align: left;"> 1= gunnel present in the quadrat or 0=gunnel absent</td>
</tr>
<tr>
 <td style="text-align: right;">
    <code>Time</code> </td><td style="text-align: left;"> Minutes after midnight</td>
</tr>
<tr>
 <td style="text-align: right;">
    <code>Fromlow</code> </td><td style="text-align: left;"> Time in minutes from low tide</td>
</tr>
<tr>
 <td style="text-align: right;">
    <code>Slope</code> </td><td style="text-align: left;"> Slope (to nearest 10 degrees) perpendicular to waterline</td>
</tr>
<tr>
 <td style="text-align: right;">
    <code>Rw</code> </td><td style="text-align: left;"> Percentage cover in quadrat of rockweed/algae/plants</td>
</tr>
<tr>
 <td style="text-align: right;">
    <code>Amphiso</code> </td><td style="text-align: left;"> Density of crustacean food 0=none to 4=high</td>
</tr>
<tr>
 <td style="text-align: right;">
    <code>Subst</code> </td><td style="text-align: left;"> Substratum: 1=solid rock, 2=rocky cobbles, 3=mixed pebbles/sand, 4=fine sand,</td>
</tr>
<tr>
 <td style="text-align: right;">
    </td><td style="text-align: left;"> 5=mud, 6=mixed mud/shell detritus, 7=cobbles on solid rock, 8=cobbles on mixed pebbles/sand,</td>
</tr>
<tr>
 <td style="text-align: right;"> 
    </td><td style="text-align: left;"> 9=cobbles on fine sand, 10=cobbles on mud, 11=cobbles on mixed mud/shell detritus,</td>
</tr>
<tr>
 <td style="text-align: right;"> 
    </td><td style="text-align: left;"> 12=cobbles on shell detritus, 13=shell detritus </td>
</tr>
<tr>
 <td style="text-align: right;">
    <code>Pool</code> </td><td style="text-align: left;"> Standing water deep?  1=yes or 2=no</td>
</tr>
<tr>
 <td style="text-align: right;">
    <code>Water</code> </td><td style="text-align: left;"> Standing water in the quadrat?  1=yes or 2=no</td>
</tr>
<tr>
 <td style="text-align: right;">
    <code>Cobble</code> </td><td style="text-align: left;"> Rocky cobbles? 1=yes or 2=no </td>
</tr>
<tr>
 <td style="text-align: right;">
  </td>
</tr>

</table>



<h3>Details</h3>

<p>This datset comes from a study on the habitat preferences of a species
of eel, called a gunnel. Biologist Jake Shorty sampled quadrats along a coastline and recorded whether or not
the species was found in the quadrat.
</p>


<h3>Source</h3>

<p>Thanks to Jake Shorty, Bowdoin biology student, for this dataset.
</p>


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